package com.rtp.transformer.fin.server.util;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
	 
    private static final SessionFactory sessionFactory;

    static {
        try {
        	// TODO parametrize and make configurable ?
            // Create the SessionFactory
            sessionFactory = new Configuration().configure("hibernate.cfg.xml").buildSessionFactory();
        } catch (Throwable ex) {
           
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static final ThreadLocal session = new ThreadLocal();

    public static Session currentSession() throws HibernateException {
    	Session s = (Session) session.get();
        // Open a new Session, if this Thread has none yet
        if (s == null) {
            s = sessionFactory.openSession();
            session.set(s);
        }
        return s;
    }

    public static void closeSession() throws HibernateException {
        Session s = (Session) session.get();
        session.set(null);
        if (s != null)
            s.close();
    }
    
    /**
     * Get a new Session, must be closed by the caller.
     * No references to this session are stored here.
     * 
     */
    public static Session newSession() throws HibernateException {
    	return sessionFactory.openSession();
    }

    
    public static void closeSessionFactory() throws HibernateException {
    	
    	sessionFactory.close();
    }
}
